## dietrich_harmon Prove using coordinate geometry: If a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment. one year ago one year ago

|dw:1359842711196:dw| choose the perpendicular bisector to be the $$y$$-axis, and the length of the segment $$2a$$, so that $$Q(-a,0)$$ and $$R(a,0)$$ compute $$\overline{PQ}$$ and $$\overline{PR}$$
let $$P(0,y)$$